Review of Cabling Techniques and Environmental Effects Applicable
Review of Cabling Techniques and Environmental Effects Applicable
Review of Cabling Techniques and Environmental Effects Applicable
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Cable types <strong>and</strong> installation techniques<br />
Table 3.14: Particular Relevance for Cable Burial Machines for<br />
Offshore Wind Farms<br />
Cable Burial Machine Burial Machine Options Relevance for Offshore Wind Farms<br />
Cable Burial Ploughs Cable ploughs are available in<br />
varying types:<br />
● Conventional narrow share cable<br />
ploughs<br />
● Advanced cable ploughs<br />
● Modular cable ploughs<br />
● Rock ripping ploughs<br />
● Vibrating share ploughs<br />
Tracked Cable Burial<br />
Machines<br />
Free Swimming<br />
ROVs with Cable<br />
Burial Capability<br />
Tracked cable burial machines can<br />
be equipped with the following<br />
burial tools:<br />
● Jetting systems<br />
● Rock wheel cutters<br />
● Chain excavators<br />
● Dredging systems<br />
Free swimming ROVs can be<br />
equipped with the following burial<br />
tools:<br />
● Jetting systems<br />
● Dredging systems<br />
Burial Sleds Burial sleds can be equipped with<br />
the following burial tools:<br />
● Jetting systems<br />
● Rock wheel cutters<br />
● Chain excavators<br />
● Dredging systems<br />
All types <strong>of</strong> cable burial ploughs could be<br />
employed for the burial <strong>of</strong> cables on <strong>of</strong>fshore<br />
wind farms. The type <strong>of</strong> plough employed will<br />
be determined by the nature <strong>of</strong> the seabed<br />
conditions. It is more likely that the cable ploughs<br />
will be used on the export cable routes as the<br />
lengths <strong>of</strong> cable are more suited to the burial<br />
method.<br />
Tracked cable burial machines could be used<br />
for the burial <strong>of</strong> the export cables, but are more<br />
likely to be employed for the burial <strong>of</strong> the interarray<br />
cables for <strong>of</strong>fshore wind farms. The type <strong>of</strong><br />
tracked cable burial machine will be determined<br />
by the nature <strong>of</strong> the seabed conditions. Those<br />
fitted with jetting systems only will be limited<br />
to work in s<strong>and</strong>y <strong>and</strong> s<strong>of</strong>t clay seabeds whilst<br />
those with mechanical cutting tools will have an<br />
extended range <strong>of</strong> use.<br />
It is unlikely that free swimming ROVs equipped<br />
with a cable burial capability would be widely<br />
used for the burial <strong>of</strong> subsea cables on <strong>of</strong>fshore<br />
wind farms. These machines are more commonly<br />
used in deeper water applications <strong>and</strong> when an<br />
intervention task such as a repair is required.<br />
Burial sleds are typically used for shallow water<br />
work <strong>and</strong> usually require diver assistance for the<br />
loading <strong>and</strong> unloading <strong>of</strong> cable. They may be<br />
utilised for the shore section <strong>of</strong> wind farm export<br />
cables but are unlikely to be used extensively for<br />
all cable systems for <strong>of</strong>fshore wind farms as they<br />
tend to be less productive <strong>and</strong> responsive than<br />
their tracked cable burial machine counterparts.<br />
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